Home / 1,109.92-1,533.36-1,101.28

Finding the Fourth Proportional to 1,109.92, 1,533.36 and 1,101.28

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Solution

The fourth proportional to 1,109.92, 1,533.36 and 1,101.28 is: 1,521.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.92 : 1,533.36 = 1,101.28 : x
  2. Step 2: Convert to fraction form
    1,109.92/1,533.36 = 1,101.28/x
  3. Step 3: Cross multiply
    1,109.92x = 1,533.36 × 1,101.28
  4. Step 4: Simplify right side
    1,109.92x = 1,688,658.70
  5. Step 5: Solve for x
    x = 1,688,658.70/1,109.92
  6. Step 6: Final answer
    x = 1,521.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.